
HM4 Humidity and Temperature Probe with
Heated Sensor
© 2014; ROTRONIC AG E-M-HM4-V0_08
4.1.3 Write Protection for Device Settings
The device settings can be protected with a password. Password protection is configured with the HW4
software.
4.1.4 Alarm Functions
Limitation of the Humidity Value
The humidity measured value can be limited to 100 %RH.
Out-of-Limits Value Alarm
Specific limit values can be defined for humidity, temperature and the calculated values; an alarm is shown
in the HW4 software when they are exceeded.
The alarm function can be enabled or disabled.
This function is a fixed component of the HM4 firmware and cannot be disabled. A short circuit at the sensor
triggers a digital alarm, which is shown in the HW4 software.
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